Malfunction Threshold

Malfunction determination 1:

The difference between the current engine coolant temperature at the radiator (ECT 2) and the initial engine coolant temperature at the radiator (ECT 2) is at least 15 °F (8 °C) when either of these condition is met:

• When the estimated engine coolant temperature reached 160 °F (72 °C).
• When the estimated engine coolant temperature changed 36 °F (20 °C).

Malfunction determination 2:

The estimated engine coolant temperature reaches to 158 °F (70 °C) before the actual engine coolant temperature at the engine (ECT 1) reaches to 158 °F (70 °C).